Plastids are the large-sized, double membrane-bound cell organelles that are responsible mainly for the process of photosynthesis, along with other functions of attracting insects for seed dispersal and pollination and storage of carbohydrates, lipids, and proteins.
Special types of chloroplasts which carry out the process of photosynthesis are green in color and contain chlorophyll pigment.
These are present in the cells of the green leaves of plants.
Chloroplasts are the site of photosynthesis in a plant cell.